For rhizosphaera needlecast, you would use 5.5 pints gallons of ECHO 720 in up to 100 gallons of water for conifers per the product label.
ECHO 720 Fungicide states on the product label: You would use 2 to 3.6 fl oz per 1000 sqft on a 7-14 day schedule. That would equal 5 ½ to 9 ¾ pints per acre. Please refer to the product label for complete instructions for algal scum.
If you are seeding a residential lawn, then you cannot apply ECHO 720 Fungicide or any other product containing Chlorothalonil. If you were overseeding an area that already has turfgrass and is one of the approved sites on the product label, then you could use this fungicide. We do not recommend using a contact fungicide like this on bare ground.
The application rate for ECHO 720 Fungicide will depend on the type of ornamental plants the product is being applied. Please refer to the Ornamental Plants section of the product label for specific application rates.